Fixed two memory issues in virtual stigmergy.
Fixed two memory issues in virtual stigmergy.

erikarn/Buzz,MISTLab/Buzz,MISTLab/Buzz,erikarn/Buzz,chavolla/Buzz,NESTLab/Buzz,chavolla/Buzz,chavolla/Buzz,erikarn/Buzz,NESTLab/Buzz,naturalmechanics/Buzz,naturalmechanics/Buzz,naturalmechanics/Buzz,NESTLab/Buzz,MISTLab/Buzz